I have dedicated server which has 10 VPS set up. I'm having email problem with plesk 8.1 or 7.5.x on it.

<what happens>
1. Send email to some major provider in Japan
2. Emails are in queek but not going out.
3. Around 5 days later, Came back with following error:
( Not all of provider but some)

CNAME lookup failed temporarily. (#4.4.3)
I'm not going to try again; this message has been in the queue too long.

I thought some CNAME Qmail patch should work but it was already patched.

So I setup webmin on VPS Server and tested. it worked fine and email has delivered.

Also tried with another Dedicated Plesk Server and it workd fine, too.

Because of these test, I think there is some problem with Virtuozzo + Plesk.

please, help!!